Title :
A microprocessor-based block cipher through rotational addition technique (RAT)
Author :
Chakraborty, Rajdeep ; Mandal, J.K.
Author_Institution :
IMPS Coll. of Eng. & Technol., Malda
Abstract :
In this paper, a novel block cipher based on a microprocessor system has been proposed where the encryption is done through rotational addition technique (RAT). The original message is considered as a stream of bits, which is then divided into a number of blocks, each containing n bits, where n is any one of 2, 4, 8, 16, 32, 64, 128, 256. The two adjacent blocks are then added where the modulus of addition is 2. The result replaces the second block, first block remaining unchanged. The modulo addition has been implemented in a very simple manner where the carry out of the MSB is discarded to get the result. The technique is applied in a cascaded manner by varying the block size from 2 to 256. The whole technique has been implemented through a microprocessor-based system by using a modulo subtraction technique for decryption.
Keywords :
cryptography; digital arithmetic; microprocessor chips; bit stream; decryption; encryption; microprocessor system; microprocessor-based block cipher; modulo addition; modulo subtraction technique; rotational addition technique; word length 2 bit to 256 bit; Bismuth; Cryptography; Data security; Educational institutions; Electronic commerce; Electronic mail; Information technology; Microprocessors; Protection; Subtraction techniques;
Conference_Titel :
Information Technology, 2006. ICIT '06. 9th International Conference on
Conference_Location :
Bhubaneswar
Print_ISBN :
0-7695-2635-7
DOI :
10.1109/ICIT.2006.13
